What do mean by "optimizing equipment?" You can equip / give items (e.g. tomes, potions) to companions in the current version.
I'll consider adding a character info menu.
Although in theory I was just explaining a bit of the same thing Randomsnowman17 said about the equipment-optimizing feature.
I'll summarize the points from my original reply, which seems to have gotten lost. Overall, I really liked the game! Although it was a bit hard to understand at first.
As for suggestions (now that I've actually put time into the dungeon):
It would be good if you added some kind of job or way to earn money outside the dungeon. It gets a bit tedious having to always explore for income (though that's only sometimes).
Being able to customize/rearrange the order of skills in the quick shortcuts — if that option already exists, I probably just didn't notice it, but it's been somewhat difficult to change the skill order. I even started a second playthrough just to add skills in the right order from the start.
Being able to interact with companions' equipment outside the dungeon. I know you can remove items from them, but it would be nice to be able to change their build before entering the dungeon.
Will you add the ability to train companions in the future? For example, in Nanako's case — at least in mine — she doesn't have any initial traits, and ends up being more of a burden in the dungeon during the first missions I did with her on the team, at least until I gave her decent equipment after farming for a while.
I hope you're planning to give Xena a little love too, needs some love as well.